before the patch you could only mind sear enemy targets, now you can mind sear friendly targets (it's an aoe) so my priest mind seared me (i was in stealth) and i knocked both the rogues out of stealth

What does the enemy see if you Sear a stealthed mate?
If they only see the Priest channeling it without revealing the position of his Rogue buddy this trick is amazing.
Invisible AoE!

i haven't tested but i assume that it only shows the priest channeling (if it doesn't it's still being useful as the enemy would have to come near, or come out of invis / stealth to knock the rogue out)

Just tested. If you don't see the target you are not going to see any sort of animation. Only thing you see is priest channeling Mind Sear and his/her hand glowing but no beam or AoE effect around the target. Priest will also turn to the direction of the target when Sear is recasted but that can be controlled by controlling camera with mouse and mowing it all the time a little bit so it wont give away the direction of the stleathed target. All in all disc priest + rogue got a lot harder to open with any stealth team if they know this trick. This also depends what map you got. Dalaran and Blade's Edge are rather cramped in space so in those maps this is rather effective.

Just tested. If you don't see the target you are not going to see any sort of animation. Only thing you see is priest channeling Mind Sear and his/her hand glowing but no beam or AoE effect around the target. Priest will also turn to the direction of the target when Sear is recasted but that can be controlled by controlling camera with mouse and mowing it all the time a little bit so it wont give away the direction of the stleathed target. All in all disc priest + rogue got a lot harder to open with any stealth team if they know this trick. This also depends what map you got. Dalaran and Blade's Edge are rather cramped in space so in those maps this is rather effective.